Patents by Inventor Uwe Hugger

Uwe Hugger has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing aminodiphenylamines
    Patent number: 6316673
    Abstract: The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtained is subsequently hydrogenated with hydrogen.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: November 13, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Henry Giera, Torsten Pohl, Uwe Hugger, Adolf Sicheneder, Fred Schuhmacher, Adolf Brill
  • Process for the preparation of nitrosobenzenes
    Patent number: 6274775
    Abstract: The invention relates to a process for the preparation of nitrosobenzene from aromatic amines by oxidation with hydrogen peroxide in the presence of a catalyst based on compounds of tungsten and/or molybdenum without the addition of the organic solvents conventionally used.
    Type: Grant
    Filed: November 6, 2000
    Date of Patent: August 14, 2001
    Assignee: Bayer Aktiengesellschaft
    Inventors: Henry Giera, Michaela Meiers, Uwe Hugger
  • Process for producing aminodiphenylamines
    Publication number: 20010012906
    Abstract: The present invention relates to the production of aminodiphenyl-amines resulting in good yields and high purity levels when aromatic amines are reacted with nitrohalobenzenes in the presence of a palladium catalyst and a base and the product thus obtained is subsequently hydrogenated with hydrogen.
    Type: Application
    Filed: February 2, 2001
    Publication date: August 9, 2001
    Inventors: Henry Giera, Torsten Pohl, Uwe Hugger, Adolf Sicheneder, Fred Schuhmacher, Adolf Brill